火烧、刈割处理下百喜草种子产量的相关通径分析  

Correlation and path analysis of seed production of Paspalum notatum under firing and cutting treatments

作　　者：杨义成[1] 龙忠富[1] 卢敏[1] 

机构地区：[1]贵州省草业科学研究所,贵州独山558200

出　　处：《山地农业生物学报》2006年第5期412-417,共6页Journal of Mountain Agriculture and Biology

基　　金：贵州省农业厅基金资助项目[黔农科字(2004)007]

摘　　要：通过对百喜草Paspalum nota tum冬季枯草进行火烧和刈割处理后,千粒重、有效穗数、单株穗数、茎重、叶重、株高、穗粒数、结实率、平均穗长、实粒数10个农艺性状因子与单株种子产量的相关和通径分析,结果表明,自然状态下和火烧、刈割处理后,千粒重对种子产量直接相关系数均达极显著水平(P<0.01),分别为0.616 51、0.749 91和0.603 10;直接通径系数自然状态下最大的为有效穗数(1.459 29),而火烧、刈割处理的最大均是千粒重(分别为0.831 25、1.150 50);10个农艺性状对种子产量的决定系数分别为0.962 89、0.971 84和0.985 48,表明用产量与各因素间的线性回归方程来估测,其可靠程度分别达96.289%、97.184%和98.548%,10个农艺性状对单株百喜草种子产量起到了决定性作用,剩余因子的通径系数分别为0.192 65、0.167 80和0.120 49,对百喜草种子产量的决定程度仅分别为3.711%、2.816%和1.452%,对种子产量的影响不大。The correlation and path analysis for ten agronomic characters, such as seed weight of one thousand grains, available number of spike ,spike number of individual plant ,weight of stem ,weight of leaf, height of plant ,seed number of spike, seeding rate, mean length of spike, available grains of spike and single plant seed yield were studied under firing and cutting treatments of withered Paspalum notatum in winter. The result showed that the correlation coefficient of weight of one thousand grains and seed production is significant at the 0.01 level under natural, firing, cutting treatments, it is 0. 616 51,0. 749 91 and 0. 603 10 respectively, the direct path coefficient of the available spike was the maximum under natural state（ 1. 459 29） ,but the direct path coefficient of seed weight of one thousand grains was the maximum under firing and cutting treatments （respectively 0.831 25,1. 150 50）, the deciding coefficient of ten agronomic characters and seed production were 0. 962 89,0. 971 84 and 0. 985 48 respectively. This indicated that the linear regression equation could estimate the relation of seed production and every factor, their correlation degree were 96. 289% ,97. 184% and 98. 548% , ten agronomic characters were the decisive factors for seed production of individual plant, the path coefficient of other factors were 0. 192 65,0. 167 80 and 0. 120 49 ,their decisive degree for seed production of Paspalum notatum were 3.711% ,2.816% and 1.452% and their effect on seed production can be neglected.

关 键 词：百喜草 刈割处理 农艺性状 产量因子 相关与通径分析 

分 类 号：S543.901[农业科学—作物学]